Pump.



PATBNTED MAY 26, 1903.

W. A. KERFOOT.

PUMP.

APPLICATION rum) SEPT. 23. 1901.

2 SHEETSSHBET 1.

N0 MODEL.

PATENTED MAY 26 1903.

W. A. KERFOOT.

PUMP.

APPLIOATION FILED SEPT. 23, 1901.

2 SHEETS-SHEET 2.

N0 MODEL.

No. teases.

UNITE STATES Patented May 26, 1903.

PATENT OFFICE.

\VILLIAM A. KERFOOT, OF EVANSTON, ILLINOIS, ASSIGNOR TO KATHERINEKERFOOT, OF EVANSTON, ILLINOIS.

PUMP.

SPECIFICATION forming part of Letters Patent No. 728,933, dated May 26,1903.

Application filed September 21% 1901. Serial No. 76.150. (No model.)

To ctZZ whom it may concern:

Be it known that I, WILLIAM A. KERFOOT, of Evanston, in the county ofCook and State of Illinois, have invented certain new and usefulImprovementsin Pumps; and I hereby declare that the following is a full,clear, and exact description thereof, reference being had to theaccompanying drawings, which form part of this specification.

My invention relates to improvements in pumps. It has special referenceto a means for controlling the motive power which is used to operatesuch pumps.

The object of my invention is to provide a means whereby the motivepower of a pump may be automatically set into operation or thrown out ofoperation with reference to the pump by means of anautomatically-arranged device, the function of which is brought intoefiect by the operation of the pump.

Whenever a pump is operated by some mechanical power to fill areceptacle, such as a water tank or reservoir, it is desirable when thesaid receptacle is filled to stop the motion of the apparatus thatsupplies the power for operating the pump either as a matter of economyor to save the wear and tear upon the said pump and the motiveapparatus. My device is especially adapted to be used with pumps of thisclass when such pumps are provided with a source of power, such as awindmill, and it contains means whereby the movement of the windmill maybe arrested with reference to the pump at predetermined times-such, forinstance, as when a tank or reservoir is properly filled with water andit consequently becomes desirable to stop the operation of the windmilland pump.

In the drawings, Figure 1 is a sectional elevation, for clearness takenon several planes, the cylinder, air-chamber, and governing-cylinderbeing shown in section on the line 1 1 of Fig. 2, the water-chambersection in a plane corresponding to the line 1, intersecting the line 1,and the discharge-pipe and tank being shown in sectional elevation-onthe line 1, intersecting the line 1 and parallel with the line 1 1. Fig.2 is a transverse section'through line 2 2 of Fig.1. Fig. 3 is anenlarged brokenaway detail of an eccentric and valve rod. Fig. 4; is aview of the regulating-cylinder,

taken on lines4 40f Fig. 1. Figs. 5, 6, 7, and 8 are modifications ofthe regulating-cylim der, spring, and piston.

In all of the views the same figures of reference indicate similarparts.

I have shown my regulating-cylinder in connection with my pump, whichforms subjectmatter for an application bearing Serial No. 61,828, filedMay 28, 1901. i

It is evident that my regulating-cylinder may be applied to any form ofpump of the general type of that shown, and is therefore not especiallyrestricted to this exact form of pump.

In the drawings, 1 is the water-chamber of the pump, to which thecylinders 2 and 3 are joined in axial line and which are provided withthe usual pistons 4 and 5. A piston-rod 6 may be extended to anypower-producing'devicesuch as a windmill, water-wheel, steamengine, orthe like-by which it may be there by reciprocated. An air-cylinder 7 ismounted on and connected with the water-chamber 1, upon the upper end ofwhich a link 8 supports the hand-lever 9, which is connected to thevertical piston-rod 6. The discharge-pipe 10 is connected with thebottom of the waterchamber 1. At the point 11 the lower end of the pipe10 is dressed off and forms a seat for a valve. Connected axially inline with the pipe 10 is a nipple 12, the upper surface of which forms avalve-seat. The nipple 12 is adapted to be adjustably screwed into thelower walls of the water-chamber 1 and to be fixed by the check-nut 12*,as shown in the drawings. The lower end of nipple 12 is connected to aconduit-pipe 13, which is led oif some distance to a reservoir. On theupper end of the pipe 13 a float-valve 15 is supported, which is adaptedto be opened by the floatweight 16 when the water in the said reservoiris below a certain determined point and which is closed by the saidfloat when the water rises to the point shown in the drawings. Avalve-rod 17 passes axially through the discharge-pipe 10 and isprovided upon itslower end with an adjustable valve 18, shown seated onthe valved seat formed by the upper surface of the nipple 12. Twoconical nuts 19, 19, one upon the lower and one upon the upper side ofthe said valve, are threaded upon the rod 17 and are the means by whichthe positions of the valve 18 may be governed with reference to itsvertical location. The nuts are conical, so as to guide the valve intoits proper position in the pipes 10 and 12. The valve 18 is shown seatedupon the seat provided upon the upper surface of the nipple 12 and isheld in position by means of the eccentric 20, which is shown enlargedin Fig. 3. The valve-rod 17 is threaded upon its upper end and isadapted to be inserted in a clip 21 and held in position by means of acheck-nut 22. By this means the position of the valve 18 may be adjustedwith reference to the eccentric 20 by lengthening or shortening the rod.When it is screwed into or out of the clip 21 and held fixed therein bymeans of the nut 22, the valve-rod 17 passes through a stuffing 23. Theeccentric 20 is provided with an eccentric-slot 24, in which a roller 25is located. The roller 25 turns upon a bolt 26, which passes through theclip and roller and is fixed by means of a cotter-pin or nut to retainit in position. 27 is a bearing upon which the eccentric 20 is adaptedto be turned.

When the eccentric is in the position shown in Fig. 3that is, when thehandle points to the right-the valve-rod 17 is depressed, and the valve18 is thereby seated upon the end of the nipple 12, as shown in Fig. 1.When the eccentric is turned to the left-or when the handle is pointingto the left, the Valve-rod 17 is thereby raised and the valve 18 isseated upon the seat 11 of the discharge-pipe 10. By this means theoutlet from the pump through the discharge-pipe or through the pipe 13to the tank 14 may be closed.

A pipe 28 communicates with the waterchamber 1 and is provided upon itslowerend with a piston 29. The piston fits closely in the cylinder 30.Two cylinder-heads or end plates 31 31 are held together by tie-rods 3232. The upper cylinder-head 31 is perforated and forms a guide upon thepipe 28. Between this cylinder-head and the piston 29 an open helicalcompression-spring 33 is placed within the cylinder, which exerts atension to move the cylinder into its most upward position. A loop 34 isfixed to the upper head 31 by means of the nuts 35 and is provided withan extension-rod 36 in axial line with the center of the cylinder. Avertical arm 37 is pivoted at a stationary point 38 and is also pivotedto a horizontal arm 39 at the point 40. A vertical rod 41 is attached tothe power-producing device and is a means by which the operation of thesaid device may be stopped and started when the arm 39 is moved in themanner hereinafter described.

The rod 41 is adapted to be pivoted at any of the holes 42, 43, 44, or45 for the purpose of changing the relation of the fulcrum and the sweepof the said arm for varying the distance that the vertical rod 41 willbe moved by agiven compressionmovement of the spring 33 within thecylinder 30. The arm 39 is provided with a slot 46, in which the bolt 47of the arm 36 is adapted to be secured at any position within the saidslot by means of a thimble-nut 48 or other suitable device. This slotmay be graduated, so that the location of the bolt 47, together'with thevertical rod 36, may be definitely known. The position of the fulcrum 47in the slot will determine the degree to which the spring 33 must becompressed in order .to move the lever 41 a given distance.

The use and operation of my device are as follows: In the position shownin Fig. 1 when the vertical pump-rod 6 is reciprocated the water fromthe pump will fiow out of the discharge-pipe 10, because the openingfrom the nipple 12 is closed by the valve 18. If now the eccentric 20 isthrown to the left, the valve-rod 17 will be raised and the valve 18will be seated upon the seat 11 of the pipe 10, and the opening to pipe10 will be thereby closed and the opening into the nipple 12 will beopened. If now the tank or reservoir 14 is empty, the float 16 willoccupy a lower position and the valve 15 will be unseated and the pipe13 will be opened thereby and water will be discharged into the saidreservoir. The regulating-cylinder and piston will be as shown in thedrawings. When the water rises in the reservoir 14, so as to raise thefloat 16, the valve 15 will thereby be closed, and the water, havingno'other exit, will enter the cylinder 30 between the lower head 31 andthe piston 29, which will force the cylinder 30 downwardly against thetension of the spring 33, thereby drawing the horizontal arm 39downwardly upon the fulcrum-points 38 and 40 and drawing down the arm41, which is attached to the source of power and which is adapted toshut off the said power and stop the pump when drawn down in thismanner. The rod 41 may be connected to a windmill for the purpose ofdrawing out the means by which the mill is set into motion, or it may beconnected to a valve that admits steam into an engine, orit may beconnected to the gate of a waterwheel, so as to shut off and entirelystop the power that operates the pump, or it may be made to shift afriction-clutch or a belt for this purpose. The farther away thereservoir 14 is removed from the pump and the smaller the pipe 13 thegreater will be the friction of the water flowing through the said pipeto the said reservoir, and for this reason the tension of the spring 33or a coacting part should be made adjustable. As it would not always beconvenient for the purchaser to adjust the spring, I provide theadjustable lever, which I have just described, and by locating thepivotal point 47 at various points in the slot 46 I am enabled tooperate the arm 39 the proper distance for the purpose of shutting offthe source that supplies the power by the varying pressure required within the cylinder'30 in accordance with the resistance or head. SupposeIplace the pivotal .point 47 as near to the pivot 40 as possible.

The vertical rod 37 will move forward toward the rod 36 upon the axis38, and the vertical rod 41 will thereby be moved a given distance withless movement of the cylinder 30; but it will require a greater pressurewithin the cylinder 30 to accomplish the movement. It now the pivotalpoint 47 be placed as near the hole 42 as possible, the vertical rod 37will be moved in a reverse direction-thatis to say, toward theair-chamber 7and to move the vertical rod 41 a given distance the spring33 will necessarily be compressed to a greater extent,.and the cylinder30 will be correspondingly moved; but it will take less pressure to moveit than in the first example.

For the guidance of the purchaser the points along the slot 46 may hegraduated and indicated as equivalent to a given weight hung upon thelever 39 for that purpose, but in lieu of the weight. The position ofthe rod 41 may be changed to any of the holes 42,44, and 45 andaccomplish the same result. These holes may also be. indicated as beingequivalent to a given weight, or a given head in the reservoir, or tothe distance said reservoir is located from the pump. It will be notedthat as the distance between the points 40 and 47 is varied the point 43may be moved in or out to keep the distance between points 43 and 47constant, whereby the links 41 and 34 may be maintained in position formost efficient application of power. The pressure required in thecylinder 30 and the tension of the spring 33 are dependent upon thefriction in the pipe 13 and also upon the head or the height of thereservoir 14 above the said cylinder.

In Figs. 5, 6, 7, and S I have shown slight modifications of thecylinder, piston, and spring which may be substituted for that showninFig. 1. The advantage of the spring inside of the cylinder is ofconsiderable value, as the spring is thereby protected from interferenceand it is not so liable to derangement and disorder as when a weight isused instead of a spring, and by this means an adjustment may be made tocompensate for the friction in the discharge-pipe leading to thereservoir and that due to the head of the reservoir of the pressure as aresult of the said head in a manner much more convenient andsatisfactory than when weights are used for this purpose, as in devicesthat have been heretofore constructed.

In order that a greater or less pressure may be required to operate thecontrolling-cylinder to balance the head and friction of the reservoirand connecting-pipe, I may increase the size and strength of the springand decrease the size of the cylinder, or vice versa. With themodification shown in Fig. 6 this may be more conveniently performed.

Having described my invention, what I claim as new and useful, anddesire to secure by Letters Patent of the United States, is-

The combination with a pump, of a controlling-cylinder, a rod 36connected to the moving element thereof, a horizontal lever-arm 39having a slot 46 therein in which said rod 36 is pivoted, and providedwith a series of perforations in one end, a pivoted link 37 to which theother end of the said lever-arm 39 is pivoted to afford a movablefulcrum 40 for said lever-arm, and a rod 41 connected to the source ofpower and'adapted to be connected with one of the perforations in thearm 39, substantially as set forth.

In testimony that I claim the foregoing as my own I affix my signaturein presence of two witnesses.

WILLIAM A. KQERFOOT.

In presence 0f-- Foni'zn BAIN, 1W1. F. ALLEN.

